$(document).on('pagebeforeshow', '#pagina4', function (event) {
        TweenLite.to(".menu", 1, {alpha:0});
    $("#icoPg1").removeClass('active');
    $("#icoPg2").removeClass('active');
    $("#icoPg3").removeClass('active');
    $("#icoPg3").toggleClass('active').siblings().removeClass('active');
    $("#icoPg3").removeClass('active');
    $("#icoPg6").removeClass('active');
    $("#icoPg7").removeClass('active');

paginaAtual = 4;
grid.defineGrid(paginaAtual);   

});

$(document).on('pageshow', '#pagina4', function (event) {
    podeVirar();
     tween =TweenLite.to("#bgBaixo", 1.5, {bottom:"-110"});
});

$(document).on('pagebeforehide', '#pagina4', function (event) {
      TweenLite.to("#bgBaixo", 0.5, {bottom:"-255"});
});